Dragons coach Dai Flanagan says some of the tackles put in by his own players in the derby match against the Ospreys "overstepped the mark".
The Rodney Parade outfit went down 37-18 to Toby Booth's side in Swansea, a game in which they were reduced to 14 after the sending off of Sio Tomkinson early in the second half for clattering fly-half Jack Walsh.
South African referee Jaco Peyper had no hesitation in producing the red card, and Walsh came in for some pretty heavy treatment across the course of the afternoon, with Ross Moriarty also sent to the bin for a late hit on the No.10.
